About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
High Entropy Alloys VIII
|
Presentation Title |
J-19: An Investigation into the Link Between Microstructure and Pitting Corrosion of Novel Alloy FBB8+Ti |
Author(s) |
Mark A. Wischhusen, Carol Glover, John Scully, Peter K. Liaw, Sean Agnew |
On-Site Speaker (Planned) |
Mark A. Wischhusen |
Abstract Scope |
Compositionally and/or microstructurally complex alloys present new opportunities for optimizing properties beyond those of traditional alloys. Using a novel hierarchical microstructure design process, a new family of creep resistant ferritic alloys, denoted FBB8+Ti, has been developed which contains semi-coherent precipitates of Heusler (L2<sub>1</sub>) and B2 intermetallic phases. The link between the microstructure and aqueous corrosion performance of these alloys is investigated by immersing samples in a 0.01 M NaCl solution under an applied potential, to determine the pitting and re-passivation potentials, in the as-cast and homogenized conditions. The phase content, microstructure, and pit-initiation sites are determined by a combination of x-ray diffraction and scanning electron microscopy. The corrosion behavior is observed to be insensitive to the Ti content. However, the pitting potentials and pit initiation sites are found to vary strongly with sample-surface preparation. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |